Two-dimensional digital-analog multimode circuits based on asymmetric vertical double-gate WSe2 transistors

Digital–analog multimode operation constitutes a critical enabling technology for next-generation integrated circuits, delivering the performance and multifunctionality necessary to fulfill dynamic system requirements. However, implementing such operation in a single circuit faces a substantial challenge, owing to the fundamentally distinct requirements on carrier transport behavior of transistors. Here, we report an asymmetric vertical double-gate (AVDG) device architecture designed to achieve digital-analog multimode operation. Specifically, the AVDG transistor combines an asymmetric source-drain configuration with dual air-gaps for barrier broadening and metal shielding, allowing the drain–source bias to serve as an additional control terminal. This design enables coordinated modulation of the channel carrier polarity and source–drain injection barriers, allowing the device to be programmed into multiple carrier-transport states. These diverse field-effect characteristics enable the realization of reconfigurable multifunctional logic and analog operations with the combined programming of dual-gate voltages and drain–source bias. With a same circuit unit composed of two AVDG transistors, we demonstrate seven digital logic functions and six analog signal-processing functions. These functions exhibit a good rail to rail logic operation, which suggests that the units could be cascaded to create complex circuits. Digital–analog multimode functional circuits can promote the development of compact mixed-signal electronics. Here, the authors report the realization of 2D digital-analog multimode circuits based on asymmetric vertical double-gate WSe2 transistors, demonstrating 7 digital logic functions and 6 analog signal-processing functions with 2 transistor circuits.